Darn, I hoped it would be easy...often is.
I'm far from knowlegable about this, but the atapi error Code 05 24 00 [Invalid field in CDB] is tough to pin down.
The first step is to try another brand of blank media
Verbatim +R media would be a good first choice instead of -R
Have you been using -R media with success until recently?
Try another usb port.
Has the drive been working ok until recently?
Any software or hardware changes in the interim?
Forgive me, but rather than re-type a bunch of stuff, please look over a recent post of mine re: an external burner...much of the troubleshooting applies:
http://club.cdfreaks.com/2079414-post11.html Nero cd-dvd speed is an excellent tool for helping to troubleshoot.
There's a link in my sig...and it's free.
If you need help with it, just holler.
I'll be back in awhile, but someone is usually around.